What is PREVACID NapraPAC 500 (lansoprazole and naproxen)?
Naproxen is in a group of drugs called NSAIDs (nonsteroidal anti-inflammatory drugs). It works by reducing substances in the body that cause inflammation, pain, and fever. Lansoprazole is in a group of drugs called proton pump inhibitors. It decreases the amount of acid produced in the stomach. The combination of lansoprazole and naproxen is used to treat symptoms of osteoarthritis, rheumatoid arthritis, and ankylosing spondylitis. The lansoprazole in this medication helps reduce the risk of stomach ulcers in people who may be at risk for them while receiving treatment with an NSAID. Lansoprazole and naproxen may also be used for purposes other than those listed in this medication guide.